I'm going to revive this thread. Hopefully others have done some experimenting and can add to the discussion.  First I wanted to talk about the pros and cons of the GPX 6000 if you're going to in fact use it for relic hunting (Yes much of this has already been discussed) . Pros-GPX 6000 is rain proof, light (compared to the 5000), attached rechargeable battery, wireless headphones, very simple to use. Cons-not many coils available (but that is changing), not many timings to choose from and